Chin strap retainer ring for headgear



FIG. 1 is a front perspective view of the design;

FIG. 2 is a front elevation view of the design;

FIG. 3 is a rear elevation view of the design;

FIG. 4 is a right side elevation view of the design, the opposing left side view of the design as well as the top view and the bottom view of the design being identical thereto and therefore not illustrated; and,

FIG. 5 is a cross-sectional view taken along line 5—5 in FIG. 3 presented for the sole purpose of clarifying the shape of the design by illustrating the exact contour or configuration of the exterior surface of the design that may not be apparent from the other views of the drawing, with no attempt being made to illustrate features of internal construction.

The structures depicted by way of broken lines in the drawings are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a chin strip retainer ring for headgear, as shown and described. 